Ersa HF3_20 操作说明 - 第575页
8 94160 - englisch_BA 06. 07.2005 ENG LIS H 1.4 Handling of Refrigerants When handling refrigerants, all legal provisions and guidelines must be complied with. Only qualified personnel may perform these activities. The o…
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94160 - englisch_BA
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1.3 Safety Notices
For the installation, operation and maintenance of the process cooler, the following regulations
and safety notices have to be observed:
Any work on the process cooler may only be performed by qualified personnel.
All relevant accident prevention regulations have to be observed.
Do not allow anybody to stand or pass underneath the forks when lifting and setting
down the process cooler; stay clear of the danger area.
The process cooler must be properly secured in order to prevent it from tipping over.
The safety devices must not be deactivated.
The electrotechnical connections of the process cooler must be performed according
to and conforming with all relevant VDE, EN and IEC standards. Beyond that, the
technical connection requirements of the local electrical utility company have to be
observed.
Do not attempt to perform any work unless the main power supply to the process
cooler has been disconnected.
Specific regional or national provisions applicable in the country where the unit will
be installed must be adhered to.
The closed refrigeration circuit contains refrigerants and refrigeration oil. These must
be properly disposed of when performing service work or placing the unit out of
service (environment).
The cooling water additives have a caustic effect on skin and eyes. When working
with cooling water additives, eye protection devices and gloves must be worn. Follow
the directions on the product’s label.
Anyone working on the refrigeration circuit must be protected by personal protective
equipment.
The process cooler is to be used exclusively for the cooling of water in accordance
with predefined specifications.
Watch out for any incompatibilities of materials in the entire water circuit.
The water must be free of all substances that could result in mineral deposits and
corrosion!
The water used in the cooling circuit must comply, at a minimum, with the values specified by
the Ordinance on Drinking Water. In the case of de-ionised water, additional constructional
features are necessary.
Based on the drinking water ordinance the following limit values are recommended:
- Electric conductivity: < 2500 µS at 20 °C
-Hydrogen concentration: 7 ... 9 (pH-value) at 20 °C
-Chloride: < 250 mg/l
-Total hardness: < 30 °dH
-Colony count: < 100 ml at 22 °C
1. For Your Safety
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94160 - englisch_BA
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1.4 Handling of Refrigerants
When handling refrigerants, all legal provisions and guidelines must be complied
with. Only qualified personnel may perform these activities.
The operator of the process cooler is responsible for the proper disposal of used refrigerants
and system parts.
1.5 Safety Requirements
concerning the operation of refrigeration systems within the European Union.
The following information applies to refrigeration systems with closed refrigeration cycles that
are used within the European Union. In some member states additional requirements may
apply, e.g. due to environmental considerations.
In the refrigeration units described in this operating manual, working pressures occur that are
subject to the regulations laid down in the Pressure Vessel Directive 97/23/EC and European
standard EN 378 (Parts 1 – 4, version September 2000).
Apart from the requirements relating to the design, equipment and testing of the refrigeration
systems prior to delivery to the customer, also the operator of such systems has to comply
with requirements in accordance with European standard EN 378 and/or additional national
regulations. These concern the installation, the operation and requalification tests of
refrigeration systems.
1.5.1 Installation
If the process cooler is installed below ground level or on upper floors of a building, without any
adequate number of emergency exits, requirements relating to the protection of people in
accordance with EN 378 have to be complied with.
With respect to the actual refrigerant charge of the process cooler, a minimum room volume
must be maintained and not be fallen short of.
Refriferant
R134a
WKS 40.02-NE 9
Minimum room sizes in [m
3
] are required for the installation of refrigeration units, depending on
the refrigerant being used.
It can thus be ensured that in the case of refrigerant leaks caused by damage to the equipment
– and thus the displacement of oxygen – will not have any detrimental effect on the health of
persons.
1. For Your Safety
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1.5.2 Operation
The owner or the operator of the process cooler is obligated to establish emergency
practices (in the case of accidents and malfunctions). A short version of the operating
instructions must be drawn up by the operator – based on this present Operating Manual – and
made known to the employees.
The quick reference guide must be clearly legible and affixed in the immediate
vicinity of the process cooler.
See Sample Quick Reference Guide.
The owner or operator of a system is obligated to keep a logbook for the process
cooler.
The system logbook must either be available on site near the process cooler, or in the event
that the data are stored in a computer of the owner or operator, a printout of the log must be
kept in the vicinity of the process cooler. It must be ensured that these data are accessible to
qualified persons for the performance of repairs and requalification/repeat tests.
See Sample System Log
1.5.3 Repeat/Requalification Testing
To ensure compliance with minimum safety and health requirements as set forth in standard
EN 378, regular testing (requalification testing) of the process coolers is to be carried out by
competent persons.
The operator is responsible for the performance of the retests.
(See Chapter Repeat Testing).
1.6 Purpose of the Process Cooler
The process cooler described in this manual is designed exclusively for the cooling of water
within the specified operating temperature limits.
1. For Your Safety